Page 67 - Revised Maths Wisdom Class - 2

Addition and Subtraction of 3-Digit Numbers 65

Addition of 3-digit Numbers with Carrying

Carrying Tens

Let us add 123 and 459.

Step 1: Add ones. 3 ones + 9 ones = 12 ones. 12 ones = 1 ten + 2 ones
Write 2 in ones column. Carry 1 ten to tens column.

Step 2: Add tens. 2 tens + 5 tens + 1 ten (Carried over) = 8 tens

Write 8 in tens column.

Step 3: Add hundreds. 1 hundred + 4 hundreds = 5 hundreds
Write 5 in hundreds column.

H T O H T O H T O

1 1 1
1 2 3 1 2 3 1 2 3

+ 4 5 9 + 4 5 9 + 4 5 9

2 8 2 5 8 2

Add the following.

H T O H T O H T O H T O

1 1 8 2 6 8 4 4 1 8 1 8
+ 2 0 2 + 3 1 2 + 2 3 9 + 1 5 3

H T O H T O H T O H T O

6 3 4 2 5 5 1 2 6 2 2 6

+ 2 2 9 + 3 3 7 + 8 1 4 + 3 5 5